Question

Explain the meaning of the terms rest and motion.

Answer 1

Hint: Mechanics is the general analysis of the relationship between motion, force, and electricity. Kinematics, dynamics, and statistics are the three sections of the topic. Kinematics is concerned with the study of material motion without taking into consideration the forces and energies that might be present. The first thing we must understand is that neither pure rest nor absolute motion exist. Rest and motion are relative terms.

Complete answer:
Classical mechanics deals with the question of how an object moves when it is subjected to various forces, and also with the question of what forces act on an object which is not moving. The word “classical” indicates that we are not discussing situations in which an object moves with a velocity which is an appreciable fraction of the velocity of light or phenomena on the atomic scale.

Rest: If a body's position does not change over time in relation to an observer, it is said to be at rest (or a reference point). The seats at a dinner table, for example, are at rest with respect to the dining table; similarly, riders on a travelling bus are said to be at rest with respect to the same bus's driver and their roles do not change with respect to the driver.

Motion: When a body's position varies over time in relation to an observer, it is assumed to be in motion (or a reference point). In the same way as the blades of a revolving fan, the hands of a running wall clock, a spinning top, and satellites are all in motion with respect to a fixed axis, the riders on a travelling bus are said to be in motion with respect to an observer standing outside the bus.

Note:Rest and motion are relative terms. When it comes to one thing, a body may appear to be at rest, but when it comes to another object, it may appear to be moving. In a running train, a passenger is at rest in relation to his fellow passengers, but in motion in relation to an observer standing on the ground.